treewide: Trace IPIs sent via smp_send_reschedule()

To be able to trace invocations of smp_send_reschedule(), rename the
arch-specific definitions of it to arch_smp_send_reschedule() and wrap it
into an smp_send_reschedule() that contains a tracepoint.

Changes to include the declaration of the tracepoint were driven by the
following coccinelle script:

@func_use@
@@
smp_send_reschedule(...);

@include@
@@
#include <trace/events/ipi.h>

@no_include depends on func_use && !include@
@@
#include <...>
+
+ #include <trace/events/ipi.h>

[csky bits]
[riscv bits]
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Guo Ren <guoren@kernel.org>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/20230307143558.294354-6-vschneid@redhat.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

ARM: actions: remove boot_lock and pen_release

The actions SMP implementation has several issues:

1. pen_release is only ever read and compared to -1, and is defined in
arch/arm/kernel/smp.c to be -1. This test will always succeed.

2. we are already guaranteed to be single threaded while bringing up a
CPU, so the spinlock makes no sense, remove it.

3. owl_secondary_startup() is not referenced nor defined, the prototype
is redundant, remove it.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

ARM: owl: smp: Drop owl_secondary_boot()

Commit 18cfd9429d8a82c49add8f3ca9d366599bfcac45 simplified the S500 SMP
code by removing a loop for pen_release in owl_secondary_boot().

Since then it is only calling owl_v7_invalidate_l1() before branching to
secondary_startup().

The owl_v7_invalidate_l1() assembler function is superfluous, too.
Therefore drop owl_secondary_boot() and use secondary_boot() directly.

Fixes: 18cfd9429d8a ("ARM: owl: smp: Drop bogus holding pen")
Cc: David Liu <liuwei@actions-semi.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>

ARM: owl: smp: Use __pa_symbol()

Replace an occurrence of virt_to_phys() with __pa_symbol() macro.

See 64fc2a947a9873700929ec0ef02b4654a04e0476 ("ARM: 8641/1: treewide:
Replace uses of virt_to_phys with __pa_symbol").

Fixes: 172067e0bc87 ("ARM: owl: Implement CPU enable-method for S500")
Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>

ARM: owl: smp: Drop bogus holding pen

The S500 SoC can start secondary CPUs without busy-looping for pen_release,
so simplify the SMP code compared to the LeMaker kernel tree.

Fixes: 172067e0bc87 ("ARM: owl: Implement CPU enable-method for S500")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Cc: David Liu <liuwei@actions-semi.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

ARM: owl: smp: Implement SPS power-gating for CPU2 and CPU3

Bring up the two remaining CPUs by calling into PM domain code.

Signed-off-by: Andreas Färber <afaerber@suse.de>

ARM: owl: Implement CPU enable-method for S500

Allow to bring up CPU1.

Based on LeMaker linux-actions tree.

Signed-off-by: Andreas Färber <afaerber@suse.de>